diff --git a/src/cfg.c b/src/cfg.c
index 31489d9..90c2550 100644
--- a/src/cfg.c
+++ b/src/cfg.c
@@ -326,23 +326,7 @@ cfg_set_server_client_key(const char *client_key, const char **errstrp)
 int
 cfg_set_server_reconnect_attempts(const char *num_str, const char **errstrp)
 {
-	const char	*errstr;
-	unsigned int	 num;
-
-	if (!num_str || !num_str[0]) {
-		if (errstrp)
-			*errstrp = "empty";
-		return (-1);
-	}
-
-	num = strtonum(num_str, 0, UINT_MAX, &errstr);
-	if (errstr) {
-		if (errstrp)
-			*errstrp = errstr;
-		return (-1);
-	}
-	cfg.server.reconnect_attempts = num;
-
+	SET_UINTNUM(cfg.server.reconnect_attempts, num_str, errstrp);
 	return (0);
 }
 
@@ -525,23 +509,7 @@ cfg_set_metadata_format_str(const char *format_str, const char **errstrp)
 int
 cfg_set_metadata_refresh_interval(const char *num_str, const char **errstrp)
 {
-	const char	*errstr;
-	unsigned int	 num;
-
-	if (!num_str || !num_str[0]) {
-		if (errstrp)
-			*errstrp = "empty";
-		return (-1);
-	}
-
-	num = strtonum(num_str, 0, UINT_MAX, &errstr);
-	if (errstr) {
-		if (errstrp)
-			*errstrp = errstr;
-		return (-1);
-	}
-	cfg.metadata.refresh_interval = num;
-
+	SET_UINTNUM(cfg.metadata.refresh_interval, num_str, errstrp);
 	return (0);
 }
 
diff --git a/src/cfg_private.h b/src/cfg_private.h
index 02748e8..e0e1e41 100644
--- a/src/cfg_private.h
+++ b/src/cfg_private.h
@@ -126,6 +126,25 @@ struct cfg {
 	(t) = val;					\
 } while (0)
 
+#define SET_UINTNUM(t, s, e)	do {			\
+	const char	*errstr;			\
+	unsigned int	 num;				\
+							\
+	if (!(s) || !(s)[0]) {				\
+		if ((e))				\
+			*(e) = "empty"; 		\
+		return (-1);				\
+	}						\
+							\
+	num = strtonum((s), 0, UINT_MAX, &errstr);	\
+	if (errstr) {					\
+		if ((e))				\
+			*(e) = errstr;			\
+		return (-1);				\
+	}						\
+	(t) = num;					\
+} while (0)
+
 #define CHECKPH_PROHIBITED(s, p)	do {				\
 	if (NULL != strstr((s), (p))) { 				\
 		if (errstrp)						\